Physical Science Grade 11

KNOWLEDGE AREA: CHEMICAL CHANGE TOPICS: ACIDS & BASES Acid-base reactions Define acids and bases according to Arrhenius and Lowry-Brønsted theories: Arrhenius theory: Acids produce hydrogen ions (H^+/H_3 O^+)/hydronium ions) in aqueous solution. Bases produce hydroxide ions (OH^− ) in aqueous solution. Lowry-Brønsted theory: An acid is a proton (H^+ ion) donor. A base is a proton (H^+ ion) acceptor.